BIO 3100 - CH 7 Pre Class Assignment

The cranial sutures begin to form at about what age?

5

Humans are born with _____ fontanelles.

6

The sella turcica is best described as:

A depression

Which of the following statements about the paranasal sinuses is true?

All of the listed responses are correct.

Identify the large fontanelle wedged between the frontal and parietal bones.

Anterior

Identify the hole that marks the opening of the ear canal on the superficial surface of the skull.

External acoustic meatus

The skull is derived (forms) from:

Fibrous membrane

Identify the small hole on the maxillary bone located below the orbit.

Infraorbital foramen

Identify the FALSE statement about a fontanelle.

It increases protection of the brain

Identify the small facial bones found in the medial wall of the orbit.

Lacrimal

Identify the region of the sphenoid bone that contains the optic canal.

Lesser wings

Identify the region of the temporal bone that articulates with the lower jaw.

Mandibular fossa

Identify the fontanelle in contact with the temporal and occipital bones.

Mastoid

Which facial bones fuse to form the upper jaw?

Maxillary

Which surface of the maxillary bones fuse together?

Medial

Which facial bones makeup the central portion of the bridge of the nose?

Nasal

Which of the following locations is not formed by part of the maxillae?

Nasal septum

Identify the landmark that is not part of the sphenoid bone.

Olfactory foramina

Identify the posterior most region of the hard palate.

Palatine bones

Which facial bones form the roof of the mouth?

Palatine bones and Maxillary

Which part of the maxillary bones form the roof of the mouth?

Palatine processes

Identify the region of the sphenoid bone in contact with the pituitary gland.

Sella turcica

A fontanelle is:

Site of future bone formation

What is another name for the anteriolateral fontanelle?

Sphenoid

Identify the region of the temporal bone found superior to the external acoustic meatus that articulates with the parietal bone.

Squamous part

Identify the landmark on the temporal bone that is a pointy spine.

Styloid process

The sphenoid bone contains a sinus.

True

Which of the following structures pass through the foramen magnum?

Vertebral artery The accessory nerve Cranial nerve XI

What is the anatomical name for the facial bones known as "cheekbones"?

Zygomatic

Identify the region of the temporal bone that forms part of the zygomatic arch.

Zygomatic process

Which fontanelle of the infant skull is shown here?

anterior

The nasal conchae __________.

assist in respiration and olfaction

When fontanelles close prematurely, the skull shape becomes distorted. This condition is known as craniostenosis. If the anterior fontanelle closes prematurely, which of the following sutures is most likely involved?

coronal suture

Which of the following bones is not a facial bone?

ethmoid

Identify the location of the sphenoid bone.

floor of the skull

Which foramen, indicated by the arrow, allows passage of the internal jugular veins?

jugular foramen

Name the bone indicated by the arrow.

maxilla

A developmental disorder called cleft palate occurs when what two facial bones fail to fuse?

maxillae

An infant born with a significantly smaller head than normal suffers from __________.

microcephaly

The optic nerve passes through which bone marking of the sphenoid bone?

optic canal

Which of the following is NOT part of the axial division of the skeletal system?

pelvic girdle

The axial skeleton provides an extensive surface area for the attachment of muscles that __________.

perform all of these functions

The structures of the internal ear are housed in the __________ of the __________.

petrous part, temporal bone

What structure is located in the hypophyseal fossa of the sphenoid bone?

pituitary gland

Which suture separates the right and left parietal bones?

sagittal

If the anterior fontanel is noticeably indented in a one year old child, it is likely that the child __________

suffers from dehydration

Which of the following bone structures exist at the fusion point between two cranial bones?

suture

Which two bones contribute to the zygomatic arch?

temporal and zygomatic

Most of the bones of the skull are connected by immovable joints called sutures. Which of the following bone pairings is NOT connected by a suture?

temporal--mandible

What bone forms part of the nasal septum?

vomer

Which of these bones is NOT part of the orbital complex?

vomer